Hukum Archimedes ( Tekanan Zat Dan Penerapannya Dalam Kehidupan Sehari hari )
Summary
TLDRThis video explores Archimedes' Principle, explaining how objects experience a buoyant force when submerged in a fluid, causing them to seem lighter. It details the mathematical relationship between buoyant force, weight of displaced fluid, and gravitational acceleration. The principle is applied to explain how ships float and submarines control their buoyancy by adjusting their weight. The video concludes with a call to action for viewers to subscribe to the channel.
Takeaways
- 🌊 The Archimedes' Principle states that when an object is submerged in a fluid, it experiences an upward buoyant force equal to the weight of the fluid displaced by the object.
- 📉 The buoyant force (Fa) can be mathematically expressed as Fa = Wb - Wa, where Wb is the weight of the object in the fluid and Wa is the weight of the object in air.
- 🔢 The weight of the displaced fluid (Wcp) is calculated by multiplying the mass of the fluid displaced by gravity, expressed as Wcp = mcp * g, where mcp is the mass of the fluid displaced and g is the acceleration due to gravity.
- 💧 The mass of the fluid displaced (mcp) is the product of the fluid's density (ρ), the gravitational constant (g), and the volume of the fluid displaced (Vcp), so Wcp = ρ * g * Vcp.
- 🚢 Archimedes' Principle is fundamental to the design of ships and submarines, determining whether an object will float or sink based on the balance between its weight and the buoyant force.
- ⬆️ An object will float if the maximum buoyant force is greater than its weight, while it will sink if the maximum buoyant force is less than its weight.
- 🏊♂️ An object will remain neutrally buoyant if the maximum buoyant force equals its weight, allowing it to hover at a certain depth.
- 🛳️ Ships made of metal, which typically have a higher density than water, can float because they displace a large enough volume of water to equal their weight.
- 🌌 Submarines can control their buoyancy by adjusting their weight, either by taking in water to increase it or expelling water to decrease it.
- 📉 When a submarine wants to sink, it takes in water, increasing its total weight beyond the buoyant force, allowing it to descend.
- ⬆️ To make a submarine rise, it expels water, reducing its total volume and weight, making the buoyant force greater than its weight, causing it to ascend.
Q & A
What is the Archimedes' principle discussed in the script?
-The Archimedes' principle is a law of physics stating that the upward buoyant force exerted on a body immersed in a fluid is equal to the weight of the fluid that the body displaces.
How does the buoyant force affect an object submerged in a fluid?
-The buoyant force acts on an object submerged in a fluid in an upward direction, opposing the weight of the object. This force is equal to the weight of the fluid displaced by the object.
What is the mathematical representation of the buoyant force according to the script?
-The mathematical representation of the buoyant force (Fa) is the weight of the displaced fluid (WBA) minus the weight of the object in air (WB). It can also be represented as Fa = ρ_liquid * g * V_liquid, where ρ_liquid is the density of the liquid, g is the acceleration due to gravity, and V_liquid is the volume of the liquid displaced.
Why does an object appear to weigh less when submerged in water?
-An object appears to weigh less when submerged in water because the buoyant force exerted by the water counteracts some of the object's weight.
How does the density of a liquid affect the buoyant force on an object?
-The buoyant force is directly proportional to the density of the liquid. A higher density liquid will exert a greater buoyant force on an object for the same volume of liquid displaced.
What is the relationship between the volume of the displaced liquid and the buoyant force?
-The buoyant force is directly proportional to the volume of the liquid displaced by the object. More volume displaced means a greater buoyant force.
How does the script explain the ability of a submarine to float or sink?
-The script explains that a submarine can adjust its buoyancy by altering its weight. It can sink by taking in water into its ballast tanks, increasing its weight, and it can float by expelling water from the tanks, decreasing its weight.
What is the condition for an object to float according to the script?
-An object will float if the maximum buoyant force is greater than its weight.
What is the condition for an object to sink according to the script?
-An object will sink if the maximum buoyant force is less than its weight.
What is the condition for an object to remain neutrally buoyant as described in the script?
-An object will remain neutrally buoyant if the maximum buoyant force is equal to its weight.
Why do ships made of metal, which is denser than water, not sink?
-Ships made of metal do not sink because they are designed to displace a large volume of water, which results in a buoyant force equal to or greater than the weight of the ship.
Outlines
🌊 Archimedes' Principle Explained
This paragraph discusses Archimedes' Principle, which explains why objects appear to lose weight when submerged in a fluid. It clarifies that the weight loss is not due to a reduction in mass but rather due to an upward buoyant force that opposes the object's weight. The principle is mathematically represented as the buoyant force (Fa) equal to the weight of the displaced fluid (WBA) minus the weight of the object in air (WB). The paragraph further explains that the buoyant force is equal to the weight of the fluid displaced by the object, which can be calculated using the mass of the displaced fluid, gravity, and the volume of the displaced fluid. This principle is crucial for understanding why objects float or sink and is applied in the design of ships and submarines.
🚢 How Ships Float and Submarines Dive
The second paragraph elaborates on how ships and submarines utilize the principles of buoyancy and gravity to float or dive. Ships float because they can displace a significant volume of water, creating a buoyant force equal to their weight. Submarines, on the other hand, can adjust their buoyancy by filling or emptying ballast tanks with water. When a submarine wants to dive, it increases its weight by taking in water, which exceeds the buoyant force, causing it to sink. To stop descending at a certain depth, water is expelled from the tanks, balancing the weight with the buoyant force, allowing the submarine to hover. To surface, water is expelled from the ballast tanks, reducing the submarine's volume and thus its weight, making the buoyant force greater than the weight, causing the submarine to rise. The paragraph concludes with a call to action for viewers to subscribe to the channel.
Mindmap
Keywords
💡Archimedes' Principle
💡Buoyant Force
💡Displaced Fluid
💡Weight
💡Density
💡Submarine
💡Gayo Apung
💡Volume
💡Gravity
💡Floating
💡Sinking
Highlights
Discussing Archimedes' Principle on the channel.
When an object is submerged in water, it experiences a buoyant force.
The buoyant force is equal to the weight of the displaced fluid.
Archimedes' Principle states that an object submerged in a fluid experiences an upward force equal to the weight of the fluid displaced.
Objects become lighter when measured in water due to the buoyant force.
The weight of the displaced fluid is calculated as the product of the fluid's mass, gravity, and the volume of fluid displaced.
The principle is fundamental to the design of ships and submarines.
An object will float if the maximum buoyant force is greater than its weight.
An object will sink if the maximum buoyant force is less than its weight.
An object will remain neutrally buoyant if the maximum buoyant force equals its weight.
Metals, despite being denser than water, can be part of floating structures like ships.
Ships float because they displace a large volume of water, equal to their weight.
Submarines can control their buoyancy by adjusting their weight.
Submarines sink by taking in water, increasing their total weight.
Submarines float by expelling water, reducing their total weight to match the buoyant force.
The principle explains how submarines can dive, hover, and surface.
The video concludes with a call to action for viewers to subscribe to the channel.
Transcripts
Halo selamat datang di channel guru IPA
Pada kesempatan kali ini kita akan
membahas mengenai hukum Archimedes
Ketika suatu benda dimasukkan ke dalam
air beratnya seolah-olah berkurang
peristiwa ini bukan berarti ada massa
benda yang hilang berat benda berkurang
saat dimasukkan ke dalam air disebabkan
oleh adanya gaya apung atau Eva yang
mendorong benda ke atas atau berlawanan
dengan arah berat benda secara matematis
dapat dituliskan Fa sama dengan W by
dikurangi
CBA sehingga WBA = w b u dikurangi Eva
dengan Eva adalah gaya apung dengan
satuan Newton dan WBA adalah berat benda
di air dengan satuan Newton dan WB udah
berat benda di udara dengan satuan
Newton fenomena ini dipelajari oleh
Archimedes yang hasilnya kemudian
dinyatakan sebagai hukum Archimedes
sebagai berikut jika benda dicelupkan ke
dalam zat cair maka benda itu akan
mendapat gaya ke atas yang sama besar
dengan berat zat cair yang didesak oleh
benda tersebut peluru Archimedes benda
menjadi lebih ringan bila diukur dalam
air daripada
saudara karena di dalam air benda
mendapat gaya ke atas ketika di udara
benda memiliki berat mendekati yang
sesungguhnya karena berat jatj air yang
didesak atau dipindahkan benda adalah
massa JAT cair yang dipindahkan dikali
gravitasi atau wcp = mcp dikali G dan
massa zat cair yang dipindahkan adalah
massa jenis zat cair yang dipindahkan
dikali volume cair yang dipindahkan atau
mcp = rotbtd dikali dcp sehingga berat
air yang didesak oleh benda adalah massa
jenis zat cair dikali gravitasi dikali
volume sat cair yang dipindahkan atau
wcp saat dengan proche dikali G dikali V
CP berarti menurut hukum
achimedes besar gaya ke atas adalah
massa jenis zat cair dikali gravitasi
dikali volume cair yang dipindahkan atau
Fa = proche dikali G dikali V CP dengan
F adalah gaya apung dengan satuan Newton
Rote adalah massa jenis zat cair dengan
satuan kg per M3 G adalah percepatan
gravitasi dengan satuan meter per sekon
persegi dan TCP adalah volume Jar cair
yang dipindahkan dengan satuan M3 hukum
Archimedes tersebut dapat digunakan
sebagai
di dasar pembuatan kapal laut atau kapal
selam suatu benda dapat terapung atau
tenggelam tergantung pada besarnya gaya
berat dan gaya apung jika gaya apung
maksimum lebih besar daripada gaya berat
maka benda akan terapung sebaliknya jika
gaya apung maksimum lebih kecil daripada
gaya berat maka benda akan tenggelam
jika gaya apung maksimum sama dengan
berat benda maka benda akan melayang
gaya apung maksimum adalah gaya apung
jika seluruh benda berada dibawah
permukaan zat cair hampir semua logam
memiliki massa jenis atau kerapatan yang
lebih besar dari air tentu kita berpikir
bahwa semua logam akan tenggelam dalam
air Mengapa kau
laut yang terbuat dari logam tidak
tenggelam kapal laut dapat terapung
Karena pada saat diletakkan secara tegas
di lautan kapal laut dapat memindahkan
air laut dalam jumlah yang cukup besar
sehingga kapal laut mendapat gaya ke
atas yang sama besar dengan berat kapal
laut Bagaimana dengan kapal selam
Bagaimana kapal selam dapat terapung
melayang dan tenggelam dalam air laut
pada prinsipnya kapal selam dapat
memiliki kemampuan tersebut karena berat
kapal selam dapat diperbesar dengan cara
memasukkan air kedalam badan kapal dan
dapat diperkecil dengan cara
mengeluarkan air dari badan kapal ketika
kapal selam akan tenggelam air laut
dimasukkan ke dalam penampung dalam
Badan kapal
Hai berat total dari kapal selam menjadi
lebih besar daripada gaya keatas
sehingga kapal selam dapat tenggelam
agar tidak terus tenggelam pada
kedalaman tertentu air dalam Badan kapal
selam dikeluarkan kembali dari penampung
sehingga berat total dari kapal selam
sama dengan gaya ke atas hal ini
menyebabkan kapal selam melayang dalam
air saat kapal selam akan mengapung air
dari penampungan pada badan kapal
dikeluarkan sehingga volume total dari
kapal selam menjadi lebih kecil daripada
gaya keatas sehingga kapal selam dapat
mengapung
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